Sash lock



l. BIRMAN SASH LOCK May 23, 1939.

Filed June 1l, 1958 FIGS..

VENT OR.

ATTORNEY.

Patented May 23, 1939 UNITED STATES PATENT OFFICE 1 Claim.

The object of the present invention is to provide a sash lock of simple and efficient construction and which, by reason of its form, may be made of maximum size and then changed to lesser sizes by simply transversely cutting unnecessary lengths from an end thereof by a simple hack saw operation, whereupon the device, without change, will be adapted for sash of lesser wall thickness than the maximum.

The device is adapted for use with a boltreceiving plate carried by a second sash and having a plurality of bolt apertures so that the sash may be locked together when relatively moved for Ventilating purposes.

The device is also adapted for application to a show-case sash and the like- The invention will be described with reference to the accompanying drawing, in which:

Figure 1 is a view in elevation showing a pair 20 of sash members to which an embodiment of the invention is applied, the sash members having been relatively moved away from fully closed position, for Ventilating purposes.

Figure 2 is an enlarged fragmentary elevation, 25 looking in the direction of the arrows, 2-2,

Figure 1.

Figure 3 is a plan view, partly in section, on the line 3 3, Figure 2.

Figure 4 is an end elevation looking in the direction of the arrows on the line 4 4, Figure 2.

Figure 5 is a diagrammatic perspective, showing application of the device to horizontally sliding sash members, as to a show-case.

Referring to the drawing, I have indicated by the rectangular line I a window frame in which are slidably mounted lower sash member 2 and upper sash member 3, Toone of the sides of sash member 3 is attached, by means of screws 4, a bolt-receiving bar 5 formed with a plurality of grooves or slots at B at spaced points therealong. To the other sash member 2 is applied the locking device.

The locking device comprises a casing having angularly related sections. The top section comprises a hollow flat surfaced member 'I, open at its outer end and adapted to slidingly receive a bolt 8. The second section 'Ir lies in depending relation to the inner end of section 'I and is apertured to receive a key-operated lock barrel 9 of any suitable construction, which is rotated by means of a key I0. The longitudinally extending aperture in section lx merges with the hollow (Cl. 'I0-90) interior of member 'I and at the top of the rotary lock barrel the latter carries a pin I I which enters a slot at I2 formed in and transversely of the bolt 8.

Pin II is disposed eccentrically with respect to the lock barrel and therefore rotation of the latter will cause an endwise movement of the bolt either inwardly or outwardly, in accordance with the direction of rotation of the barrel. 'I'he inner face 'Ix of the casing section 'Im is preferably flat so as to directly abut the sash member 2 and preferably to be countersunk therein as shown in Figure 2.

In order to secure the lock casing to sash 2, I form in the flat faced wall of section la: a threaded aperture to receive a screw I3. At the outer end of the bolt-guiding section I the latter fits within the yoke end I4 of plate I4 and plate I4 is apertured at its lower end to receive the screw I3, the head of the screw exerting a clamp- N ing action upon plate I4 to securely hold the same in place. Plate I4 is preferably countersunk into the rear face of sash 2 as indicated more particularly in Figures 2 and 3.

It will be seen that the bolt-guiding member I may be transversely cut in order to reduce its size from a maximum sash thickness to any thickness up to the minimum, Therefore, it is unnecessary to manufacture a plurality of sizes of my sash-locking device, the maximum size being very quickly adapted for smaller sizes by simply transversely sawing the member l at the desired transverse line, which will out through both the bolt and the bolt-guiding walls. The yoke plate I4 will not be affected and it is only necessary to employ a screw I3 of suitable length.

Having described my invention, what I claim and desire to secure by Letters Patent, is as follows:

A sash lock comprising a casing having angularly extending sections, one section being adapted for engagement with the front of a sash and the second section to overlie an edge margin of the sash, a bolt slidably movable within the last-named casing section, a key-operated barrel disposed in the rst-named section and operatively connected to the bolt, an apertured yoke plate adapted to embrace the bolt-receiving section of the casing, and a screw passing through said yoke plate and threaded within the lock barrel-receiving section of the casing.

ISIDORE BIRMAN. 

